My husband and I just adopted a 5 month old Hahn's macaw, surely much smaller than your macaw, but the avian vet said our birdy is still considered to be a "baby". I'll admit he sure acts like a baby. He makes all kinds of vocalizations. During the day sometimes he'll make mini-squawks so frequently that I think he has hiccups. Other types it's just errr errr sound. Only when he's calling out does he make the big "traditional" loud squawk.
When we first adopted our guy he was good at "step up", but for some reason after the avian vet visit he became stubborn about it. If we are forced to grab him he makes a pathetic crying sound. Well, that's pretty much too bad! We don't hurt him, but he can't stay out all night long.
We have found that at night our Hahn's macaw makes different sounds that almost sound like human speaking practice. It's kind of crazy sounding. I get the feeling he is trying to somehow impress us into not covering his cage for the night.